I would much rather live in a world where punishment is reserved for the judicial system - where, thanks to lawyers, everyone gets a chance to a proper defense - than your intended alternative.
I don't see how it conflicts with "everyone gets a chance to a proper defense" (at least as much as "everyone gets a chance to a proper defense" is true in the current system), so there might be some misunderstanding here.
I can't. That makes two of us.